Activision have revealed what we long suspected: Uprising will be the 2nd DLC pack for Black Ops 2 and will release first exclusively for Xbox 360 later this month.

Here’s the blurb…

Call of Duty: Black Ops II Uprising will include four new exotic multiplayer maps, plus an exciting new Zombies experience called “Mob of the Dead” that takes players to Alcatraz with four of the actors behind some of Hollywood’s most iconic mobsters, including Ray Liotta, Chazz Palminteri, Joe Pantoliano, and Michael Madsen.

“With Uprising, the team has really outdone itself again,” said Mark Lamia, Treyarch’s Studio Head. “In addition to creating four amazing new multiplayer maps, the studio has been hard at work on the Zombies front to surpass what we accomplished with ‘Call of the Dead.’ What they’ve done this time around is nothing Zombies fans have seen before – and if you don’t believe me, just wait until you get into Purgatory.”

The Mob of the Dead experience focuses on four prohibition-era mobsters, Billy Handsome, Al ‘The Weasal’ Arlington, Salvatore ‘Sal’ DeLeuca and Michael ‘Finn’ O’Leary serving time in an Alcatraz prison. They intend to break out of Alcatraz, but have their plans foiled by the undead. The group must work through cells and buildings, fighting off zombie prisoners and guards.

Mob of the Dead also boasts a new feature “Purgatory” which sends players into the afterlife.

Here’s details on the new maps…

Uprising also delivers another four new, exotic and diverse multiplayer maps set around the globe for fans to jump into. “Magma” is a modern Japanese village with volcanic eruptions carving multiple paths throughout the town. “Encore” takes place in the aftermath of a deserted London music festival and leaves numerous opportunities for run-and-gun, close quarters combat. “Vertigo” is a futuristic high rise in India housing a high-tech lab featuring dizzying vistas and multi-tiered pathways. Finally, “Studio” is a contemporary remake of “Firing Range,” a fan-favourite multiplayer map from the original Call of Duty®: Black Ops. “Studio” is a Hollywood movie back lot with a variety of cinematic themes that range from Sci-Fi to the Old West.

Uprising will release April 16th for 1200 MSP or at no additional charge for Season Pass holders.

Update: A new trailer has gone live for Uprising. Check out the new mode and maps in action…